/mcp• To disable automatic negotiation, choose No and continue with the next step. The NIC Speed and Duplex Configuration window is displayed. Step 3 If you chose to disable automatic negotiation, manually choose the appropriate NIC speed and duplex settings now and choose OK to continue. The MTU Configuration window displays. Step 4 In the MTU Configuration window, you can change the MTU size from the operating system default. The maximum transmission unit (MTU) represents the largest packet, in bytes, that this host will transmit on the network. If you are unsure of the MTU setting for your network, use the default value, which is 1500 bytes. Caution If you configure the MTU size incorrectly, your network performance can be affected. • To accept the default value (1500 bytes), choose No. • To change the MTU size from the operating system default, choose Yes, enter the new MTU size, and choose OK. The DHCP Configuration window displays. Step 5 For network configuration, you can choose to either set up a static network IP address for the node or to use Dynamic Host Configuration Protocol (DHCP). Static IP addresses are recommended. If you use DHCP, use static DHCP. • If you have a DHCP server that is configured in your network and want to use DHCP, choose Yes. The network restarts, and the Administrator Login Configuration window is displayed. • If you want to configure a static IP address for the node, choose No. The Static Network Configuration window displays. Step 6 If you chose not to use DHCP, enter your static network configuration values and choose OK. The DNS Client Configuration window is displayed. Step 7 In the DNS Client Configuration window, click Yes to enable DNS and enter the DNS client information. Step 8 Click OK and choose one of the following in the Basic Installation procedure: • Proceed: • Click Proceed to restart the network using the new configuration. The Administrator Login Configuration window is displayed. • Enter Administrator login User Name and Password Note Make sure that the User Name contians alphanumeric characters. Use the same login cerdentials to Cisco Unified Communications Operating System Administration, the Command Line Interface, and the Disaster Recovery System. • Software Location of Data to Import Installation Guide for Cisco Unified Communications Manager and the IM and Presence Service, Release 15 and SUs 54 Installation Methods Configure Attended Installation